This is just a watered down version of a Yoga pose.
I started out stretching for martial arts, but what I have found is that Yoga works the best for stretching. The poses work synergistically together and seem to be more effective than other forms of stretching (except for PNP, but that is not static stretching like we are talking about here).
So get a Yoga book/tape and pick out of it a few good poses that hit your desired target muscle groups. Then do that daily, or as much as possible and you will see a fast improvement in your flexibility.
A word of caution; static stretching does effect your muscles just like strength training in terms of recovery. So don't push each stretching session too much or you will negatively effect you strength training and overall recovery.